Jarla Thiesbrummel; Francisco Peña‐Camargo; Kai Oliver Brinkmann; Emilio Gutierrez‐Partida; Fengjiu Yang; Jonathan Warby; Steve Albrecht; Dieter Neher; Thomas Riedl; Henry J. Snaith; Martin Stolterfoht; Felix Lang · 2022 · Advanced Energy Materials
Paper
Abstract Understanding performance losses in all‐perovskite tandem photovoltaics is crucial to accelerate advancements toward commercialization, especially since these tandem devices generally underperform in comparison to what is expected from isolated layers and single junction devices. Here, the individual sub‐cells in all‐perovskite tandem stacks are selectively characterized to disentangle the various losses. It is found that non‐radiative losses in the high‐gap subcell dominate the overall recombination in the baseline system, as well as in the majority of literature reports. Through a multi‐faceted approach, the open‐circuit voltage ( V OC ) of the high‐gap perovskite subcell is enhanced by 120 mV. Employing a novel (quasi) lossless indium oxide interconnect, this enables all‐perovskite tandem solar cells with 2.00 V V OC and 23.7% stabilized efficiency. Reducing transport losses as well as imperfect energy‐alignments boosts efficiencies to 25.2% and 27.0% as identified via subcell selective electro‐ and photo‐luminescence. Finally, it is shown how, having improved the V OC, improving the current density of the low‐gap absorber pushes efficiencies even further, reaching 25.9% efficiency stabilized, with an ultimate potential of 30.0% considering the bulk quality of both absorbers measured using photo‐luminescence. These insights not only show an optimization example but also a generalizable evidence‐based optimization strategy utilizing optoelectronic sub‐cell characterization.
Analysis
This paper investigates and addresses open-circuit voltage (VOC) losses in all-perovskite tandem solar cells to improve their performance and commercialization potential.
Discovery
Constantin Bach; Dong Won Kim; Yitian Du; Yana Vaynzof; Carsten Deibel
Oussama Er-Riyahi; Dorota Biernacka; Yating Guo; Mikel Ballarena Tellechea; Silver-Hamill Turren-Cruz; Dario Bercioux; Meng Li; Agnieszka Lekawa-Raus; Jorge Pascual; Karolina Z. Milowska
Dilfuza Shukurova
Elisabetta Brivio; Luigi Vesce; Andrea Danelli; Sofia Spagnolo; Pierpaolo Girardi
Penglei Sun; Shuyan Chen; Xiang Liu; Longhan Zhang; Huajie You; Chang Yan; Yongqi Zhang; Xiaowen Chu; Tong-yi Zhang
Lai X; Zhang X; Jiang J; Zhao X; Lin Q; Hu G; Chen H; Zhang L; Zhang HM; Xin K; Wei W; Bian H; Wang H; Shen L
Source record